Safety-razor.



N 892 629. PATBNTED JULY v 190s.

G.P.TAYL0R.

SAFETY RAZOR.

D 9. APPLICATION FILE APB 1906 2 BEBETB BHEET 1.

. PATENTED JULY 7, 1908. G. P; TAYLOR. SAFETY RAZOR. APPLIOATIONF1Lnnn.9.-19oe.

z ann-SHEET 2.

GEORGE P. TAYLOR, OF CLINTON, MASSACHUSETTS.

SAFETY-RAZOR.

No. 892,629. j

Specification of Letters Patent.

Patented July '7, 1908.

Application filed. April 9, 1906. Serial No. 310,669.

j citizen of the United States, residing at Clinton, in thecounty ofWorcester and State of Massachusetts, have invented a new and usefulSafety-Razor, of which the following is a specification. c

My invention relates to that class of razors known as safety razors, theprincipal objects thereof being to provide such. a razor aving a rigid,permanently shaped concavo-conveX polygonal blade of substantiallyuniform thickness having means for supporting and positively holding theblade at three or more points; to force the backing plate against theguard-plate by means effectively a plied to the backing-plate on theside of t e lade op osite to that on which the backingplate is ocated soas to get more efficient action; to so construct the parts as to avoidthe liability of injuring the edges in setting the blade; and to providemeans whereby the blade will not have to be changed as often as is thecase with the present vmakes of safety razors. y

Further objects and advantages of the yinvention will appear below.

Reference is to be had to the accompanying drawings in which,

Figure l is a side elevation of' a razor constructed in accordance withthe principles of my invention. Fig. 2 is a sectional view of the sameon the line 2--2 of Fig. 3. Fig. 3

Ais a plan of the backing-plate of the same.

Fig. 4 is a plan of the blade. Fig. 5 is a plan of the ard-plate. Fig. 6is a sectional view on the ine 6-6 of Fig. 7 showing my invention in amodified form. Fig. 7 is a plan of the backing-plate of the same. Fi 8isa plan of the guard-plate of the form s own in `ig. 6. Fig. E) is asectional view on the line 9-9 of Fig. 10 showing another form in whichmy invention may be embodied. Fig. 10 is a plan of the backing-plate ofthe same. Fig. 11 is a plan of the guard-plate usd in Fig. 9, and Fig.12 is -a central verticasectional view showing another forni of theinvention, and Fig. 13 is a sectional view of a part of the same.

Referring to thefirst five iigures, it is to be noted that the inventionis shown as applied to a hollow handle 1() through which asses a rod 11.This rod is rovided with a liead 12 constituting a shou der on the endof the handle 10 While thehandle is rovided with an inwardly projectingring 13 earing on the rod and assisting in keeping the latter 1n centraiposition. `Above this ring is a socket 14 in which is located a hub 15constituting a artA of the guard-plate 16. This hub is holow and throughitis adapted to move a projection 17 on the backing-plate 18. Thisprojection is hollow and internally screw. threadedI to fit the screw onthe rod 11. A blade 1S) is provided with a perforation 20 through whichthe projection 17 extends. It will be seen that by this construction,the force to hold the backing-plate is exercised by the clamping meanswhich, in the present form, is represented by the screw-threaded rodentering the screw-threaded projection 17. rhis clamping means islocated on the o posite side of the blade from the backingp ate 18 andit exerts pressure on the backing-plate in such a manner as to mostefficiently hold the blade in position on the guard-plate. By thisconstruction also, there are no projecting parts on the backing plateand nothing which is likely to be injured or to cause injury. Theadjustment of 4the backingplate is readiiy secured by turning the hea12, while the backing-plate is accurately located in central position bythe bearing of the ring 13 on the rod 11, also by the hub 15 bearing onthe rejection 17 The most successful sa ety razors which have heretoforebeen constructed are rovided with resilient flexible blades. t is Well.known that the tempering of steel for a razor is carried on at adiierent temperature than tempering for springs, consequently if theresiliency of this blade is secured in its highest de ree, it is at theexpense of the 'temper'of t e blade for the purpose for which it isintended. Furthermore, by providing these normally flat blades andforcing them to a curved position, if they are not given a properspring. temper, they are likely to become set when kept clamped in theholder for long periods or theyeven may be broken when under thepressure necessary to hold` them firmly in position. In order toovercome these difficulties and to generally imrove articles of thisclass, have formed the blade 19 of a comparatively rigid piece of steelof substantially uniform thickness havinfr a permanent form. This formis preferi yab y concavo-convex and the guardlate and backing-plate areof corresponding s ape so that the entire attention of the manufacturercan be given to producing the proper steel and the proper temper for thebest razor blade. 'As this blade does not have to be bent or iiexedwhile setting it in the tool, it does 'not have to undergo the severestrains mentioned and does not have to be teinpered in such a way as toin any de ree destroy its value as a razor blade.) hgurthermore, it canbe more easily honed and stropped. lRazor blades of this character ihave usually been provided with one or at the most, two cutting edges,and when set in the handlehave been held by pressure ex erted betweenthe backing-plate and the guard-plate and have been positively held byp'ojections or the like at the two ends of the ade. A The positive meansfor holding the blade is necessarily relied upon to a great extent in Asecuring 1t 1n ositlon and 1t 1s of course imtively holding-means at theends of the sev eral 'cutting edges and for three or more cutting edges,I have placed three or moreholding means on the blade and have not onlysecured the results above mentioned but have provided a blade which canbe used longer and consequentlydoes not have to be changed j as often asthose which haveheretofore been used. v

The holding means to which I have referred'. consists in the form nowbeing described, of three projections 21 and a guard- I thorou hly keein a su plate 16. The projections `fit, when thev arts are 1n posi'tiinin notches 22 on the blade and similar notches 23 on the backingplate.In the form illustrated in Figs. 6,- 7 and 8, the parts are of a similarnature but the backing-plate itself is provided with a projection 24which passes through an enarged perforation in the blade and into acavity 25 on the' guard-plate. 4This assists `in guiding the arts and asthis shoulder and cavity are'of t e same general shape as the blade, inthe present instance triangular, the same result as to positive holdingof the parts in position is secured. In this instance the other partsare as above *described but the ends of the cutting edges of the bladeare rigidly connected together so as to more the concave-convex bladestantia y rigid condition independently of the thickness `of thematerial 'of which it is made. This is also true of the form shown inthe next three figures.

In the form shown in'Figs. 9, 10' and 11',

instead of a roundedv concavo-convex blade,

backing-plate, and guard-plate, I have' illustrated these elements asbeing provided with s'eaeae j l j a number of blade surfacescorresponding to the number ofcutting edges ofthe blade. .When threecutting edges are used there will be three planesrintersecting in threelines,

and giving the general concavo-convex effect and the advantages thereof.

with an upwardly extending flange 26 having a notch 27 therein. In thiscase, the blade is provided with a'corres ondin projection 28 'enteringthe notch an affor' ing the-means for holding the parts positively inposition. The backing-plate may also be ,constructed in the same shapeas the blade.

It will bei seen that when the principles one of the forms shown orotherwise, the objects mentioned above will be attained.

In Figs. 12 and 13 I have shown another form in which the backing-platemay be clamped to the main body of the structure., In this form, theclamping plate, which forI Fig. 6, is not provided with a perforationbut is secured directly to a rod 111 which. passes through the hollowhandle 10 and has an. en- `largement, at its outer end.l This enlargement is provided with. a cam groove 113 which is referably helical andwith a longitudinal s ot 1 14 communicating with the end of the groove.In place of the head 12, shown in the other figures., a cap 120 isproadapted to enter the grooves 114 and 113 to 'clamp the parts inposition in an obvious will be observed that the objects above mentionedare attained with this form, at least, as efliciently as with the otherforms illus-v trated. e

. While I haveillustratedand described certain forms in which myinvention may be emisnot limited to these specific forms, as manymodications niay be made by any person skilled in the art,fwithin thescope of my in-` vention as expressed in the claims.

Havin thus`fully described my invention,

1. In a safety razor, the combinationofa hollow handle having a socket,.a screwthreaded rod passing through said handle, a guard-plate,separate from the handle and having ahub cooperating with the sockettherein and a backing-plate havingl an internally screw-threaded hollowprojection passing into said socket and engaging the screw-threaded rod.

2. In a safety razor, the combination of a hollow handle having asocket, a screwthreaded rod passing through said handle, a guard-platehaving a hollow hub projecting meeting preferably at the center oftheknife vided, this cap having a projection .121"

bodied, it is to be understood that the same what I c aim andvdesire tosecure by Letters into the socket, and. .a backing-plate havingl In thisform also, I haveshown a guard-plate as provided thus set forth arecarried out, Whether in any convenience is illustrated as of the typeofV f .manner against the end ofthe handle 10. It

i an internally screw-threaded hollow projeclio handle, a guard-plate se,tion passinginto said socket and hub and engaging the screw-threadedrod, and a rigid blade located on said plate, said blade having anopening for said projection.

4. In a safety razor, the combination of a hollow, handle having asocket, a screwthreaded rod passinf through said handle, a guard-plateseparab e from the handle and having a hollow hub, a backing-platehaving an internally screw-threaded ho low projection passing into saidsocketand hub and engaging the screw-threaded rod, and a rigid bladelocated on said plate, said blade having an opening for said projection,said guardplate having means located at more than two points for holdingthe blade in fixed position.

5. Ina safety razor, the combination of a hollow handle, ascrew-threadedrod therein, a guard-plate separate from the handle, a backing-platehaving an internally screwthreaded hollow projection passing into thehandle and engaging the screw-threaded rod, and a rigid blade having anopening for said projection, said guard-plate having means ocated atmore than two points for holding the blade in fixed position, said meanscomprising a non-circular cavity fitting the projection on thebacking-plate.

6. In a safety razor, the combination of a hollow handle, a rod passingtherethrough, a guard-plate separable from the handle and having ahollow hub projecting into the handie, said rod entering lsaid hub, anda backing plate having van integral projection passing into said hub andremovably secured to said rod.

7. In a safety razor, the combination of a arate from the handle havinga polygona cavity2 the handle having means for fixing the position ofthe guard-plate, and a backing-plate havinOr a projection passing intothe cavity and guided thereby.

S; In a safet razor, the combination of a I' handle, a guar( -plateseparate from the handle having a tr1angular cavity in its outer face,the handle having means for fixing the position of the guard-plate, anda bac ingplate having a triangular rojection passinor into thecavity inthe guardplate and guided thereby to hold the blade 1n fixed positionbetween said plates.

9. In a safety razor, the combination of a hollow handle, a rod therein,a guardlate having a hollow hub projecting into'the andie, a backinglatehaving a projection passing into the hu and secured to the rod, saidbacking-plate and guard-plate being ol' a general triangular forni, anda blade having lthree cutting edges and three non-cutling edges, each ofthe latter being opposite one of the cutting edges, said blade beingheld between the guard-plate and the backingplate. g

'10. In a safety razor, the combinationA of a guard-plate having anon-circular cavity therein, a backing-plate having a projection of thesame shape as said cavity, and adapted to pass into the cavity to guidethe guardplate and backing-plate and prevent their turning with res )ectto each other, and means extending t irough the projection and thecavity for fastening the guard and backing plates together.

1l. A safet razor having a rigid permanently sha e 'concave-convexpolygonal blade of sustantially uniform thickness.

, 12. In a safety razor, the combination of a hollow handle, a rodtherein, a guard-plate separable from the handle and having a hollow hubprojecting into the handle, a backinglate having a projection passinginto the liub and secured to the rod, a permanently concavo-convexblade, the guard-plate and backinglate being of the same shape as the.blade, tie backing-'late having a central projection having si es at anangle to each other, each side being parallel with a cutting edge of theblade, the guard-plate having a de ression for receiving said projectionand ho dino* the parts in position.

13. In a razor, the combination of a handie, a guard-plate separablefrom the handle and having a triangular cavity in its outer side, abackinglate having a triangular projection adapte to enter said cavity,said lates being concave-convex, a cutting blade aving a triangularperforation for receiving the projection on the backing-plate, saidblade being permanently concave-convex and having a cutting edgeparallel with each of the edges of said erforation, ,the curvature ofthe blade being along lines parallel with xthe cutting edges whereby theblade is held in position on the guard and backingplates partly by itsown curvature.

14. As an article of manufacture, a safety razor having a permanentlyshaped polygonal concave-convex cutting blade, a conveX Guard plate, anda concave backing la'te of substantially the same shape as the bllade,whereby the backing plate and guard plate may be clamped toget 1er uponthe blade to hold it without bending it.

l5. As an article of manufacture, a safety razor having a polygonalconcave-convex cutting blade, the curvature of the blade being on linesparallel with the cutting edges, a convex guard plate, and aconcavebacking plate of substantially the same shape as'the blade, whereby theblade may' b held in pol having a proJection passing into said socket,-sition on the guard and backing lates partly and means onysaid rod forsecuring the said by its own curvature, and said p ates ma be partstogether. i clamped together upon the blade to ho d it In testimonwhereof I have hereunto set 5 Without bending it. my hand', in t epresence of two subscribing v15 16. In a safety razor, the combinationof a witnesses.

hollow handle having a socket, a rod passing GEORGE P. TAYLOR. throughsaid handle, a guard vplate separable Witnesses: A from the handle andhaving a hub ooperat- VLOUIS W. SOUTHGATE,

lo i'ng with the socket therein, abaoking plate l C. F. WEssoN. :i

